Current forecasts from NOAA and other models point to a San Francisco overnight low in the mid- to upper-50s on September 30 under clear skies and moderate westerly onshore flow, keeping the marine layer in place and limiting radiational cooling. This setup aligns with late-September climatology, where average lows hover near 56°F amid persistent Pacific influence and light winds that prevent sharp drops. Trader sentiment remains split across the 47°F-or-below and 56-57°F bins because small shifts in wind speed, marine-layer depth, or localized fog formation—common in the Golden Gate corridor—could easily push readings a few degrees cooler or warmer depending on the exact measurement site. New model runs and NWS updates over the next 48 hours will refine these thresholds ahead of resolution.